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Got a 1999 7.3 F350 here. Starts reasonable in 70F. Anything…

Got a 1999 7.3 F350...
Got a 1999 7.3 F350 here. Starts reasonable in 70F. Anything colder and it needs to be plugged in. 1 GP is bad but rest work. Starts good hot. Has a slight miss in 1 cyl when cold. Has very weak throttle response cold.. has to warm up before you can properly drive. Has P1271, P1273, P1274, P1275,P1278 codes. Also comes up with P0263 & P0284 when I do contribution test, doesn't come up by itself in the regular OBDII scan. Are the injectors shot or is the IDM shot?
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Answered in 7 minutes by:
10/13/2017
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Transmissions
Satisfied Customers: 4,835
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicle
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Let me look this up I m away from my laptop
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Customer reply replied 4 months ago
Any headways on the question?

I apologize for the dealy , your question disappeared of my screen and just seen it again

sorry again

DTC P0263 troubleshoot pin point test should be done first, the rest are collateral fault caused by dtc P0263,after repairing dtc p0263 ,c;ear fault and rescan and see what comes back if any

Possible causes

1-Broken compression ring

2-Inoperative injector assembley

3-leaking or bent valves

4-Bent push rod

5-Broken roller arm bolt

6-bent connecting rod

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Customer reply replied 4 months ago
Ok... The picture of the inj plugs are from a 94-97 7.3 I think? I need the single plug on 99+... But I think I can figure out which is what there tho. Do you know what the ohms are supposed to be in the Inj plugs? I take it I put one lead on the center pin on plug and then check the 2 right next on either side?

yes that is correct , not sure on the ohm, but measure it when hot , and compare to all pins ,and see if one or 2 are off readings comparing to rest and inspect those connectors and wiring

Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Transmissions
Satisfied Customers: 4,835
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicle
Verified
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Customer reply replied 4 months ago
I'm not a wiring guy... 6 of the injectors ohm out at 3.2. one at 5.8 and one at 4. Does that mean the circuit is shorting or open or?

the 5.8 is the issue , shorted out not open ,if open we will have no reading ?

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Chad Farhat
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Transmissions
Satisfied Customers: 4,835
4,835 Satisfied Customers
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicle

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